I think deleting the member's account and banning his E-Mail will fix your problem.
I have a problem, when I filter the word "arse" between curly brackets {arse}. People can not register with names like Barse, or Darseen! they would get a message (your name contains the word arse, please try another name). So, I've deletd this word and other words just to let users register their names.
Is there a fix for this problem? thank you..